# hv_vm_get_max_vcpu_count(_:) Returns the maximum number of vCPUs that the hypervisor supports. ``` func hv_vm_get_max_vcpu_count(_ max_vcpu_count: UnsafeMutablePointer) -> hv_return_t ``` ## Parameters `max_vcpu_count` The maximum number of vCPUs on output. Undefined if the call doesn’t succeed. ## Return Value [`HV_SUCCESS`](/documentation/Hypervisor/HV_SUCCESS) if the operation was successful, otherwise an error code specified in [`hv_return_t`](/documentation/Hypervisor/hv_return_t). ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)